Noun
apparent magnitude (countable and uncountable, plural apparent magnitudes)
(astronomy) a numerical measure of the brightness of a star, planet etc.; a decrease of 1 unit represents an increase in the light received by a factor of 2.512
The consequences of things are not always proportionate to the apparent magnitude of those events that have produced them. Thus the American Revolution, from which little was expected, produced much; but the French Revolution, from which much was expected, produced little. Charles Caleb Colton
47 Tucanae has an apparent magnitude of 3.9, meaning that it is visible to the naked eye; it is a Shapley class III cluster, which means that it has a clearly defined nucleus. Source: Internet
Algol is located about 92.8 light years from the Sun, but about 7.3 million years ago it passed within 9.8 light years of the Solar System citation and its apparent magnitude was about −2.5, which is considerably brighter than the star Sirius is today. Source: Internet
Alpha and Beta Coronae Australis are the two brightest stars with an apparent magnitude of around 4.1. Source: Internet
Because it is a red dwarf with an apparent magnitude of 9.54, it is too faint to see without a telescope or powerful binoculars. Source: Internet
Apparent magnitude The absolute magnitude can be used to help calculate the apparent magnitude of a body under different conditions. Source: Internet